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<table width="100%" summary="page for quakes"><tr><td>quakes</td><td align="right">R Documentation</td></tr></table>

<h2>Locations of Earthquakes off Fiji</h2>

<h3>Description</h3>


<p>The data set give the locations of 1000 seismic events of MB &gt; 4.0.
The events occurred in a cube near Fiji since 1964.
</p>


<h3>Usage</h3>

<pre>quakes</pre>


<h3>Format</h3>


<p>A data frame with 1000 observations on 5 variables.
</p>

<table summary="Rd table">
<tr>
 <td align="right">
    [,1] </td><td align="left"> lat      </td><td align="left"> numeric </td><td align="left"> Latitude of event</td>
</tr>
<tr>
 <td align="right">
    [,2] </td><td align="left"> long     </td><td align="left"> numeric </td><td align="left"> Longitude</td>
</tr>
<tr>
 <td align="right">
    [,3] </td><td align="left"> depth    </td><td align="left"> numeric </td><td align="left"> Depth (km)</td>
</tr>
<tr>
 <td align="right">
    [,4] </td><td align="left"> mag      </td><td align="left"> numeric </td><td align="left"> Richter Magnitude</td>
</tr>
<tr>
 <td align="right">
    [,5] </td><td align="left"> stations </td><td align="left"> numeric </td><td align="left"> Number of stations reporting
  </td>
</tr>

</table>



<h3>Details</h3>


<p>There are two clear planes of seismic activity.  One is a major plate
junction; the other is the Tonga trench off New Zealand.  These data
constitute a subsample from a larger dataset of containing 5000
observations.
</p>


<h3>Source</h3>


<p>This is one of the Harvard PRIM-H project data sets.  They in turn
obtained it from Dr. John Woodhouse, Dept. of Geophysics, Harvard
University.
</p>


<h3>Examples</h3>

<pre>
require(graphics)
pairs(quakes, main = "Fiji Earthquakes, N = 1000", cex.main=1.2, pch=".")
</pre>


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